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Don't access line[-1] for a zero-length "line" from fgets.

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A NUL byte at beginning of file, or just after a newline
would provoke an invalid buf[-1] access in a few places.

* builtin-grep.c (cmd_grep): Don't access buf[-1].
* builtin-pack-objects.c (get_object_list): Likewise.
* builtin-rev-list.c (read_revisions_from_stdin): Likewise.
* bundle.c (read_bundle_header): Likewise.
* server-info.c (read_pack_info_file): Likewise.
* transport.c (insert_packed_refs): Likewise.

Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jim Meyering
2008-01-04 18:37:41 +01:00
committed by Junio C Hamano
parent 95bf4bd4f7
commit 872c930dcb
6 changed files with 6 additions and 6 deletions
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2
builtin-rev-list.c
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@ -520,7 +520,7 @@ static void read_revisions_from_stdin(struct rev_info *revs)
while (fgets(line, sizeof(line), stdin) != NULL) {
int len = strlen(line);
if (line[len - 1] == '\n')
if (len && line[len - 1] == '\n')
line[--len] = 0;
if (!len)
break;